Have you already decided on the style in which you will make your board? It's just that the tutorials can be different depending on what you want to do. I have been making these game boards for several years, and I can recommend several options. You can search in Google yourself, or you can pay attention to the guys from
https://trimthatweed.com/how-to-finish-cornhole-boards/ [trimthatweed.com] since they explain everything very clearly for a beginner. I think you can quickly deal with the whole theory and move on to practice. I hope you will succeed, and if it does not work out, then write me in dm. Good luck